This drama is pretty difficult to grade. On one hand it's very unique, with a heartwarming story, there is no love triangle and there are quite a few brilliant moments in the drama. On the other hand the chain of misunderstandings is just too much, borderline makjang-ish. Decided to give it an 8, because it's just too awesome and memorable for anything less.

UEE was incredible as Do Hee, I don't understand what all the hate is about, I could not imagine anyone doing a better job in this role. Choi Woo Shik was surprisingly great as well, though I only knew him from Fight for My Way. They had great chemistry too. The rest of the cast were also decent, the casting director did a great job.

The OTP's romance is really on point, I just wish they would have foregone the mandatory breakup in ep14, at least the ending was great, a really satisfying happy ending. (I don't care much about the result of that trial)

As for the second leads I'm on the fence about their relationship. For starters I did not like the second ML's character and it took 16 episodes to resolve their principal misunderstanding. At least the confusion about his sexual identity was kind of amusing.

One thing I noticed is that in the early episodes Hogoo's shenanigans caused me a lot of secondary embarrassment, I felt like he is mentally challenged. However in the second half his character was adjusted to become much more capable and attractive. Natural character development cannot possibly be held accountable for this upgrade.

The semi animated opening credits were awesome.

edit:
I've increased the score to 9, because I keep thinking about the drama & feel a strong urge to start a rewatch session already only after a few days..

edit2 (1 year later):
Changed it again to 10, the reason being that the romance is just so incredible, that the flaws are easy to ignore. There are very few dramas out there that give me the same feels.